In the world, Janco (Янко 
, Janco 
, ינקו 
) is quite a common masculine first name. The first name Janco is characteristic of Bulgaria, where it is a common boy's name, Bolivia, where it is a rare male name, and Netherlands. Not in comparison with a country's population, the name is most common in Bulgaria, South Africa, and Ukraine. Likewise, Janco is the last name as well as the forename.
Janco is also a name for the fictitious and mythical characters: Јанко Плетикосић , character in A monk and a hajduk: a short story about the last days of Serbia in the 15th century and Јанко , character in Radiša or what kind of teacher we need in the village.